    <template>
<el-menu
           background-color='#2b2b2b'
           text-color="#fff"
      active-text-color="yellow"
      default-active="1-3"
      class="el-menu-vertical-demo"
      >
      <el-submenu index="1">
        <template slot="title">
          <i class="el-icon-location"></i>
          <span>患者管理</span>
        </template>
          <el-menu-item index="1-3">选项3</el-menu-item>
          <el-menu-item index="1-4-1">选项1</el-menu-item>
      </el-submenu>
    </el-menu>

</template>

<script>
export default {};
</script>

<style scoped>.el-menu{
    border-right:none;
}
</style>